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An isoceles prism of refracting angle 17...

An isoceles prism of refracting angle `179^@` and refractive index 1.5 is used as a biprism by keeping it 10 cm. away from the slit, The edge of the biprism being parallel to the slit. The slit is illuminated by light of wavelength 500 nm and the screen is 90 cms. away from the biprism. Calculate the location of the centre of 20th dark band and the path difference at this location.

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CHETANA PUBLICATION-Wave Optics-Exercise
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